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Hi

I want add .mdf file in visual studio 2010 but in add conncetion show this error :

click this link to show error

use SQL server 2008 R2 and VS2010
and I dont know what

Please help me or give me a learning file or website

Thanks

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Dani AI

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A compact troubleshooting checklist for the .mdf / "Add Connection" problem raised by . Most failures come from the SQL Server service not having access to the file, a version mismatch, or trying to attach the file the IDE cannot handle directly. The steps below resolve the majority of cases.

  • Verify the SQL Server instance that Visual Studio is targeting is running (check Services or SQL Server Configuration Manager).
  • Attach the .mdf with SQL Server Management Studio (safer than Server Explorer): connect to the instance, right-click Databases -> Attach -> Add -> select the .mdf -> OK.
  • If attaching fails with access/IO errors, set NTFS permissions so the SQL Server service account (e.g., NT SERVICE\MSSQLSERVER, NT SERVICE\MSSQL$SQLEXPRESS, or NETWORK SERVICE) has Full Control on the .mdf/.ldf folder, or move the files into the SQL Server data folder. Running the attaching tool with elevated rights during testing can expose permission problems.
  • If the error mentions an incompatible database version, confirm the .mdf was created by the same or an older SQL Server engine; newer-engine .mdf files cannot be attached to older servers.
  • If the log (.ldf) is missing and the file appears valid, SSMS can recreate the log, or the following T-SQL can attach and rebuild the log (use with caution):
CREATE DATABASE [MyDB] ON (FILENAME = 'C:\Path\MyDB.mdf') FOR ATTACH_REBUILD_LOG;

When attaching for application use, an AttachDbFilename connection string is common (SQL Server Express example):

Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\MyDB.mdf;Integrated Security=True;User Instance=True;

If problems persist, consult the SQL Server error log and Windows Application event log for the exact message; that text usually pinpoints whether the issue is permissions, corruption, or version mismatch. For official guidance on attaching databases, see Attach a database.

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Please Give me the link then I'll delete it

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Someone please help me to make, so I need

Member Avatar for BEHZADnr

Please let somebody answer me, for a project need
Give the answer if s earlier
Or Give me a training file, answer me earlier Agrm'll Give Thanks
Thanks again

Edited by BEHZADnr because: n/a
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